// Object.assign()
const target = { a: 1 };

const source1 = { b: 2 };
const source2 = { c: 3 };

Object.assign(target, source1, source2);
target // {a:1, b:2, c:3}
console.log(1/0)
console.log(1/-0);
console.log(+0===-0)
console.log(0*1)